<div>
  <%= form_for @changeset, "#",
  id: "post-form",
  phx_target: @myself,
  phx_change: "validate",
  phx_submit: "save" do %>

    <%= textarea f, :body %>
    <%= error_tag f, :body %>

    <%= submit "Save", phx_disable_with: "Saving..." %>
  <% end %>
</div>
